CAM plants function using crassulacean acid metabolism.Like C₄ plants,CAM plants provide a preparatory step for the Calvin cycle.CAM plants are found in hot,dry environments;to prevent dessication,they keep their stomata closed during the day.They take in carbon dioxide at night while stomata are open.To increase the concentration of carbon dioxide available to the enzyme rubisco and minimize the degree of photorespiration,the CAM plants carboxylate
A)phosphoenolpyruvate.
B)oxaloacetate.
C)organic acids.
D)ribose.

Question

Quizplus · Accepted Answer

CAM plants carboxylate organic acids such as malate or oxaloacetate during the night. These organic acids are stored in the vacuole and provide a source of carbon dioxide during the day when the stomata are closed. This allows the CAM plants to continue photosynthesis and conserve water by keeping their stomata closed during the day.

CAM Plants Function Using Crassulacean Acid Metabolism